Degradation of Methylene Blue by Microwave Discharge Plasma in Liquid

Wang, Bo; Sun, Bing; Zhu, Xiaomei; Yan, Zhiyu; Liu, Yongjun; Liu, Hui

doi:10.1002/ctpp.201300007

Cited by 33 publications

(11 citation statements)

References 18 publications

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“…The highest energy efficiency obtained was 27 g/kWh when the decoloration efficiency was 55%, and it decreased to 11.4% when the decoloration efficiency was 93.6% at the same power consumed and initial MB concentration. It is worth mentioning that this value of the energy efficiency is much higher than that reported for the decoloration of MB solutions of characteristics close to our study but using different plasma techniques such as plasma jet (0.4 g/kWh at ~ 88% decoloration) [51] pulsed corona discharge (4.6 g/kWh at 91% decoloration) [52] over solution surface, pulsed corona discharge in gas bubbles (5 g/kWh at 90% decoloration) [46], microwave plasma (0.12 g/kWh at 96.56% decoloration) [53] and DC corona discharge (1.2 g/kWh at 95.7% decoloration) [54] in solution, and Ar bubbling discharge (~0.8 g/kWh at ~100% decoloration) [55].…”

Section: Decoloration and Energy Efficienciessupporting

confidence: 83%

Development and characterization of a wire-plate air bubbling plasma for wastewater treatment using nanosecond pulsed high voltage

Abdelaziz

Ishijima

Tizaoui

2018

Journal of Applied Physics

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This study developed a prototype of a wire-plate air bubbling plasma reactor that can be easily scaled up for wastewater treatment. The electrical characteristics, including the discharge current and average power consumed, of the developed reactor were deeply investigated at different operating parameters and solution conductivities. The performance of the reactor was examined on the basis of energy efficiency and methylene blue (MB) decoloration efficiency. Moreover, the removal of the total organic carbon and the changes of the physicochemical properties of solution, including pH, conductivity, and temperature, were evaluated. The analysis of current discharge and average power consumed showed that the discharge mode in the present reactor is a filamentary streamer. Interestingly, the solution conductivity had no effect on the average power consumed at low applied voltages, due to confinement of the discharge in a small area surrounding the discharge electrode in the gas phase. However, at relatively high voltages, the effect of conductivity on the average power consumed was noticeable, yet it had no effect on the decoloration efficiency at the same average power. The present reactor showed a high energy-efficiency value of 42 g/kWh at 50% decoloration of 30 mg/l MB solution, but it dropped to 14 g/kWh at 97% decoloration. A first-order kinetics model described well the decoloration reaction rates and the overall rate constant correlated linearly to the average power.

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Section: Decoloration and Energy Efficienciessupporting

confidence: 83%

Development and characterization of a wire-plate air bubbling plasma for wastewater treatment using nanosecond pulsed high voltage

Abdelaziz

Ishijima

Tizaoui

2018

Journal of Applied Physics

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“…MW discharge in liquids has been studied for water and aqueous solutions, n ‐dodecane, commercial cooking and mineral oils, wastes of cooking and mineral oil, organosilicon oil, alcohol solution, and n ‐heptane . Combined action of MWs and ultrasound waves has also been studied .…”

Section: Introductionmentioning

confidence: 99%

Nanosize carbon products formed in microwave discharge in liquid alkanes

Averin

Lebedev

Щеголихин

et al. 2017

Plasma Processes & Polymers

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Carbon‐containing nanosize solid‐state phase have been produced in the atmospheric pressure microwave (MW) plasma ignited in the gas bubbles in liquid alkanes CnH2n+2 (n = 7, 8, 10, 15, 16). Gas bubbles are generated by flow of argon. According to SEM data, the solid‐state products are represented by particles having dimensions in the range of 100–200 nm. Raman spectra of the sooty‐like unpurified solid products permit to categorize them as sp3+sp2 mixed forms of carbon comprising mainly an “damaged grapheme” along with a “few‐layer” graphite nanoparticles. NMR spectra of the solid products show strong aromatization and formation of various unsaturated molecular fragments. FTIR‐ATR spectra indicate that the carbonaceous nanoparticles are contaminated with minor amounts of different hydrocarbon residues and oxidized species.

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“…Electrical discharge into a liquid generates a larger spatial distribution and higher plasma density than high voltage UV lamp illumination . Therefore, PLP can lead to photo‐chemical water splitting for H 2 generation …”

Section: Introductionmentioning

confidence: 99%

Effect of Liquid Phase Plasma Irradiation on Production by Photocatalytic Water Splitting over SrTiO₃ Photocatalysts

et al. 2019

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A plasma in liquid state was applied as a light source in photocatalysis. The effects of liquid phase plasma irradiation were investigated for hydrogen evolution on the photocatalysts. The photocatalytic activities for hydrogen production from liquid phase plasma and UV light irradiation were compared. SrTiO 3 perovskite photocatalysts which prepared by a sol-gel method with high temperature calcining were introduced in the photocatalytic reaction. The effects of the metal loading on the perovskite photocatalysts were also evaluated in photocatalysis. A small amount of hydrogen was generated in the photo-decomposition by irradiation of plasma into water without photocatalysts. The rate of hydrogen evolution by photocatalysis using plasma was increased on TiO 2 and SrTiO 3 perovskite photocatalysts. The photocatalytic activity was improved significantly with the metal loading on SrTiO 3 perovskite photocatalysts.[a] Dr.

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Degradation of Methylene Blue by Microwave Discharge Plasma in Liquid

Cited by 33 publications

References 18 publications

Development and characterization of a wire-plate air bubbling plasma for wastewater treatment using nanosecond pulsed high voltage

Development and characterization of a wire-plate air bubbling plasma for wastewater treatment using nanosecond pulsed high voltage

Nanosize carbon products formed in microwave discharge in liquid alkanes

Effect of Liquid Phase Plasma Irradiation on Production by Photocatalytic Water Splitting over SrTiO₃ Photocatalysts

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Degradation of Methylene Blue by Microwave Discharge Plasma in Liquid

Cited by 33 publications

References 18 publications

Development and characterization of a wire-plate air bubbling plasma for wastewater treatment using nanosecond pulsed high voltage

Development and characterization of a wire-plate air bubbling plasma for wastewater treatment using nanosecond pulsed high voltage

Nanosize carbon products formed in microwave discharge in liquid alkanes

Effect of Liquid Phase Plasma Irradiation on Production by Photocatalytic Water Splitting over SrTiO3 Photocatalysts

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Effect of Liquid Phase Plasma Irradiation on Production by Photocatalytic Water Splitting over SrTiO₃ Photocatalysts